A.the center of the hydrodynamic forces acting on the underwater hull to resist the effect of the wind
B.the point of influence of wind on the ship
C.the pivot point
D.the point on the ship's above-water structure upon which the whole force of the wind can be considered an act
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A.turning ability deteriorates
B.virtual mass increases
C.the effect of the propeller transverse thrust on yaw alters
D.the ship will turn with its head towards the wind
A.obscured
B.darkened
C.greyed
D.delighted
A.Free of charge
B.Important
C.Required
D.Unnecessary
A.identification
B.distinction
C.discrimination
D.clearly seeing
A.Chain stopper
B.Devil's claw
C.Hawse ratchet
D.Riding pawl
最新試題
Conventional anchors are least likely to hold in a bottom consisting of（）.
You are entering port and have been instructed to anchor，as your berth is not yet available.You are on a SW’ly heading，preparing to drop anchor，when you observe the range lights as shown on your starboard beam.You should（）.
When weighing anchor in a rough sea，how would you avoid risk of damaging the bow plating （）.
You are underway in fog and you hear one prolonged blast followed by two short blasts.This is a vessel（）.
When entering the bridge，pilots of the Suez Canal want the master of the ship to fill in （）.
What effect is achieved from soaking an anchor（）．
Mariners should ensure correct（）of aids to navigation during twilight periods when some lighted aids to navigation are lit while others are not.
You are proceeding down a channel and lose the engine（s）.You must use the anchors to stop the ship.Which statement is true（）.
You are landing a single-screw vessel，with a right-hand propeller，starboard side to the dock.When you have approached the berth and back the engine，you would expect the vessel to （）.
You are approaching the pilot station with the wind fine on the starboard bow and making about 3 knots.You can help to calm the seas by taking what action just before the pilot boat comes along on the port side（）.